This question is a brain teaser; 2,007 pennies are worth 1 cent more than 2,006 pennies. A penny minted in 2007 has the same value as a penny minted in 2006 as of 2014.
There are a number of factors to take into account when determining the value of a coin. The number of coins that were produced, the mint mark and the condition of the coins are a few of the factors that are taken into consideration when determining the value of a coin. Since 2006 and 2007 pennies are relatively recent, and there are many of these coins in circulation, the value of the coins is minimal.